Python code cleanup across docs, wrappers, testing

[betochimas]

This PR aims to add suggested changes from issue #2037, opened back in 22.02 cycle, as well as adding new suggested changes from 22.04 and 22.06 work. Issue #2037 is expected to change alongside this PR, so it will be in draft mode for a while, and it's to be determined if this will fully close #2037

(OUTDATED: #2194 is the successor PR for this issue)

[codecov-commenter]

Codecov Report

Merging #2188 (96e7fee) into branch-22.06 (017baab) will increase coverage by 0.35%.
The diff coverage is n/a.

❗ Current head 96e7fee differs from pull request most recent head 494853f. Consider uploading reports for the commit 494853f to get more accurate results

@@               Coverage Diff                @@
##           branch-22.06    #2188      +/-   ##
================================================
+ Coverage         72.41%   72.77%   +0.35%     
================================================
  Files               157      157              
  Lines             10496    10496              
================================================
+ Hits               7601     7638      +37     
+ Misses             2895     2858      -37     

Impacted Files	Coverage Δ
...graph/cugraph/centrality/betweenness_centrality.py	89.65% <ø> (ø)
python/cugraph/cugraph/comms/comms.py	70.23% <ø> (+35.71%)	⬆️
python/cugraph/cugraph/community/egonet.py	97.36% <ø> (ø)
...ython/cugraph/cugraph/community/ktruss_subgraph.py	85.29% <ø> (ø)
...cugraph/cugraph/dask/centrality/katz_centrality.py	32.14% <ø> (+7.14%)	⬆️
python/cugraph/cugraph/linear_assignment/lap.py	71.42% <ø> (ø)
python/cugraph/cugraph/sampling/node2vec.py	91.11% <ø> (ø)
python/cugraph/cugraph/structure/hypergraph.py	21.53% <ø> (ø)
.../cugraph/tests/test_edge_betweenness_centrality.py	84.93% <0.00%> (+0.60%)	⬆️
...graph/cugraph/tests/test_betweenness_centrality.py	83.01% <0.00%> (+0.62%)	⬆️
... and 4 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 017baab...494853f. Read the comment docs.